netdev - Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for virtio_net

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Date:   Tue, 20 Oct 2020 10:44:53 +0300
From:   Eli Cohen <elic@...dia.com>
To:     Jason Wang <jasowang@...hat.com>
CC:     <wenxu@...oud.cn>, <netdev@...r.kernel.org>, <eli@...lanox.com>
Subject: Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for
 virtio_net_config

On Tue, Oct 20, 2020 at 10:03:00AM +0800, Jason Wang wrote:
> 
> On 2020/10/19 下午5:07, wenxu@...oud.cn wrote:
> > From: wenxu <wenxu@...oud.cn>
> > 
> > Qemu get virtio_net_config from the vdpa driver. So The vdpa driver
> > should set the VIRTIO_NET_S_LINK_UP flag to virtio_net_config like
> > vdpa_sim. Or the link of virtio net NIC in the virtual machine will
> > never up.
> > 
> > Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
> > Signed-off-by: wenxu <wenxu@...oud.cn>
> > ---
> >   drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 ++
> >   1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > index 74264e59..af6c74c 100644
> > --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > @@ -1537,6 +1537,8 @@ static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
> >   	ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features;
> >   	ndev->config.mtu = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
> >   					     ndev->mtu);
> > +	ndev->config.status = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
> > +					       VIRTIO_NET_S_LINK_UP);
> >   	return err;
> >   }
> 
> 
> Other than the small issue pointed out by Jakub.
> 
> Acked-by: Jason Wang <jasowang@...hat.com>
> 
> 

I already posted a fix for this a while ago and Michael should merge it.

https://lkml.org/lkml/2020/9/17/543